TY - GEN
T1 - A two-conserved scalar model for HCCI engine applications
AU - Hamosfakidis, Vasileios
AU - Kobiera, Arkadiusz
AU - Im, Hong
AU - Assanis, Dennis
PY - 2007
Y1 - 2007
N2 - A two-conserved scalar model is proposed to model homogeneous charge compression ignition (HCCI) combustion. The model describes the reactive scalar variables in terms of the mixture fraction, Z , and the initial EGR fraction, J , where the two variables represent inhomogeneities in the fuel-air mixture and in the fresh mixture-EGR charge, respectively. The main benefits of this approach are the reduction of dimensionality in solving for the reactive scalars, and the reduced number of equations in the fluid mechanics calculation. The conserved scalar space is rediscretized at each time step by a proper zone creation strategy based on the mass distribution and reactivity in each computational cell, for which the reactive scalar variables are reinitialized in order to account for the nonlinear effect of EGR on reaction rates. The model has also been implemented into the KIVA-3v code to simulate HCCI combustion. The results show excellent agreement with experimental data, demonstrating the high fidelity and computational efficiency of the present approach.
AB - A two-conserved scalar model is proposed to model homogeneous charge compression ignition (HCCI) combustion. The model describes the reactive scalar variables in terms of the mixture fraction, Z , and the initial EGR fraction, J , where the two variables represent inhomogeneities in the fuel-air mixture and in the fresh mixture-EGR charge, respectively. The main benefits of this approach are the reduction of dimensionality in solving for the reactive scalars, and the reduced number of equations in the fluid mechanics calculation. The conserved scalar space is rediscretized at each time step by a proper zone creation strategy based on the mass distribution and reactivity in each computational cell, for which the reactive scalar variables are reinitialized in order to account for the nonlinear effect of EGR on reaction rates. The model has also been implemented into the KIVA-3v code to simulate HCCI combustion. The results show excellent agreement with experimental data, demonstrating the high fidelity and computational efficiency of the present approach.
UR - http://www.scopus.com/inward/record.url?scp=84943524057&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84943524057
T3 - 5th US Combustion Meeting 2007
SP - 2164
EP - 2174
BT - 5th US Combustion Meeting 2007
PB - Combustion Institute
T2 - 5th US Combustion Meeting 2007
Y2 - 25 March 2007 through 28 March 2007
ER -